concurrency-limiter

concurrency-limiter is a Go library that provides fine-grained control over concurrent access to shared resources. It helps prevent resource exhaustion and improves system stability by managing goroutine execution with advanced admission policies.

Key Features

• Strict Admission — Goroutines wait until capacity is available via Wait/Run methods.
• Soft Admission — Goroutines can bypass the limiter after a timeout via WaitOrBypass/RunOrBypass.
• Priority Scheduling — High-priority goroutines get preferential access, with optional dynamic priority escalation to prevent starvation.
• Timeout Support — Configurable wait timeouts return errors or allow bypassing.
• Context Integration — Supports context cancellation for graceful termination.
• Runnable Wrappers — Convenient Run and RunOrBypass functions to encapsulate logic.

Philosophy

The library emphasizes flexibility and fairness, offering both strict and soft admission modes to balance resource protection with responsiveness. Dynamic priority ensures low-priority tasks don't starve, making it suitable for production systems.